Migration and Informal Insurance: Evidence from a Randomized Controlled Trial and a Structural Model
研究通过随机对照试验发现，为孟加拉国贫困农户提供季节性迁移交通补贴改善了风险分担，并利用结构模型估算出该实验使福利提升12.9%。
Abstract We document that an experimental intervention offering transport subsidies for poor rural households to migrate seasonally in Bangladesh improved risk sharing. A theoretical model of endogenous migration and risk sharing shows that the effect of subsidizing migration depends on the underlying economic environment. If migration is risky, a temporary subsidy can induce an improvement in risk sharing and enable profitable migration. We estimate the model and find that the migration experiment increased welfare by 12.9%. Counterfactual analysis suggests that a permanent, rather than temporary, decline in migration costs in the same environment would result in a reduction in risk sharing.